Tesla shares declined 7.8 percent to $236.91, its lowest closing price since Aug. 1, after CEO Elon Musk showed off a Model S equipped with dual motors for all-wheel drive and sensors that will eventually give the cars new safety and autopilot features.

“This car is nuts. It’s like having your own personal roller coaster — just use it anytime,” Musk said at the event while detailing the ability of the highest-end Model S to accelerate from zero to 60 mph in 3.2 seconds.

Analysts were impressed by the new features, but worried they may not have much of an effect on sales as they increase the price of a car already considered too expensive for many potential buyers. While a base Model S costs about $75,000, the all-wheel drive option will add at least $4,000 to the price tag, with the most expensive option now costing more than $120,000, keeping the target market squarely in the luxury category.

“That seems like an unlikely thing to happen just based on a tweet, but I don’t know … I think the stock moves for random reasons. And if that ends up being a mood barometer then it’s not a happy land,” Musk said in a Bloomberg TV interview.

“Elon’s infectious enthusiasm for his product makes customers and observers feel like they are part of something exciting, something bigger than just cars,” Morgan Stanley analysts wrote in a Friday note. “Kudos to Tesla for debuting the piloting features when the rest of the industry is still cowering behind legal/liability concerns.”

Tesla and Mobileye were not alone Friday — tech stocks were absolutely slaughtered, with the SV150 plummeting 2.7 percent and the tech-heavy Nasdaq dropping 2.3 percent, much larger slide than more broad-based indexes.

The chip sector suffered some of the steepest declines Friday after the CEO of Arizona chipmaker Microchip Technology warned about impending doom for semiconductor companies. “Microchip often sees the turn of the industry ahead of others in the semiconductor industry. … We believe that another industry correction has begun and that this correction will be seen more broadly across the industry in the near future,” Steve Sanghi wrote in a warning about his company’s disappointing quarterly revenues, explaining that his company’s revenue recognition standards would show trouble before other chipmakers. Five Silicon Valley chip companies sank more than 10 percent Friday, including Monolithic Power and Spansion, which each declined more than 15 percent for the worst performances in the SV150. The world’s largest chipmaker, Santa Clara-based Intel, dropped 5.1 percent to $31.91, while the largest supplier of equipment for fabricating chips, Applied Materials, declined 5 percent to $19.83.

President Recep Tayyip Erdogan said Tuesday that Turkey would boycott U.S.-made electronic products, escalating a feud with the Trump administration that has contributed to the rapid decline of the Turkish currency.

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